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Systems of linear equations, once again.

Consider a system of linear equations like  1, where the number of rows equals the number of unknowns, i.e. p=n. We can write it in matricial form AX=B, where

Suppose that A is invertible. We have:

$AX=B \longleftrightarrow X=A^{-1}B.$


Noah Dana-Picard
2001-02-26